James peestoe



mum.) J. PRESTON.

BOILER HOE.

Patented July 10, 1883.

WITNESSES 1 ATTORNEYS.

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PATENT JAMES PRESTON, OF NEW YORK,N. Y.

BOlLER-HOE.

srncrFIcArmN forming part of Letters Patent N0. 280,951, dated July 10,1883.

Application filed November 213, 188:2. (No model.)

To aZZ whom it may concern.- Be it known that 1, JAMES PRESTON, of thecity, county, and State of New York, have invented a new and ImprovedBoiler-Hoe, of which the following is a full, clear, and exactdescription.

The object of my invention is to provide an improved boiler-hoe whichcan scrape a large surface of the boiler and can easily be introducedthrough the hand-hole into the boiler.

The invention consists in a boiler-hoe formed of a block to which twowings are pivoted, which wings can be separated by a block attached to arod passing through the block to which the wings are pivoted, wherebythe blades or wings can be passed intothe boiler through the hand-holewhile folded, and can then be spread within the boiler by drawing theblocks toward each other andlocking them in position by a nut. A" verylarge hoe can thus be formed by which the inner surface of a boiler canbe scraped clean very effectively and rapidly.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a longitudinalsectional view of my improved boiler-hoe,showing it passed through the hand-hole of a boiler. Fig. 2 is a planview of my improved boiler-hoe, showing it folded before it isintroduced into the hand-hole of the boiler.

Fig. 3 is an end view of my improved boiler-hoe, showing the wingsextended. inner sides of the wings, sh owing them extended. 7

Two blades or wings, A, are pivoted to top and bottom lugs, B, on oneside of ablock, C, in such a manner that the wings can swing toward eachother or can be swung from each other to rest against the surface of theblock from which the lugs project. The edges of the wings A are taperedtoward the end on curved lines, and the top and bottom edges of theblock 0 are curved. so that the edges of the wings A and the top andbottom edges of the block. 0 form continuous segmental lines. The block6 isprovided with an aperture, D, between the inner ends of the wings A.

A rod or tube, E, is attached at one end Fig. 4 is a perspective view ofthe i scale from a boiler.

to the middle of a block, F, which is provided with transverse ridges Gat the ends, between which ridges a recess is formed of sufficient sizeto receive the lugs B B of the block C, the width and height of theblock F being the same as that of the block 0, and the top and bottomedges of the block F being curved the same as the top and bottom edgesof the block 0. The other end of the rod E is screwthreaded, and ispassed through the aperture D in the block 0. Thetlength of the blocks Cand F must not be greater than the length i of the hand-hole H of theboiler, so that the blocks 0 and F can be passed through the saidhand-hole into the boiler. If the hoe is to be introduced into a boiler,the ends of the wings A are folded against the ends of the block F, asshown in Fig. 2, and the blocks F and C are passed into the boiler.After the block 0 has been passed within the boiler, the block F isdrawn toward the block 0 in the direction of the arrow a, whereby thewings A will be swung in the direction of their arrows a against thesurface of the block 0, and when the block F rests against the outspreadwings and the wings rest against the block 0 the wings will be at rightangles to the rod E, and the lugs B will pass into the recesses betweenthe end I ridges, G, of the block F, as shown in Fig. 1,

and will then hold the wings A in place, and will prevent the block Ffrom turning independently of the block C. A tube, J, is then passedover the rod until one end of the said tube J rests against the surfaceof the block 0, and then a nut, K, is screwed on the threaded end of therod E. A handle-rod, L, provided with a handle, M, of any suitableconstruction, is screwed 011 the end of the rod E, which handle is usedto manipulate the hoe within the boiler. As the edges of the extendedwings A and the blocks 0 F form continuous segmental curves, the hoethus formed will fit closely against the curve of the inner side of theboiler, and can be used to scrape off scale and draw it toward thehand-hole.

The especial advantage of my above-described hoe is that it covers avery large part of the inner surface of the boiler, and thus greatlyfacilitates the labor of removing the The hoes used heretofore were nolarger than the hand-hole, as

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I8 v a 280,951

they could not otherwise be introduced into the hand-hole. 7

The blades of my improved hoe can be of any desired length, as they. maybe folded against each other -to permit them to pass through the handhole. wings and the blocks 0 and F are tobe sharpened sufficiently toadapt them to scrape the scale from the boiler.

If desired, the sleeve J can bedispensed with, and the entire length ofthe rod E sc're'wthreaded, so that the nut K can be screwed directlyagainst the surface of the block (3;

but as that would require considerable time I prefer to use the sleeveJ.

Having thus described my invention, I claim as new and desire to secureby Letters Patent,

1. A boiler-hoe constructed with two wings hinged to a block connectedwith a handlerod, substantially as herein shown and described, wherebythe wings can be folded when introducing the hoe through the hand hole,and can be extended after the hoe has been passed through the hand-hole,as set forth. l

2. In a boiler-hoe, the combination, with wings pivoted to a block, ofan additional block provided with a rod passing through an aperture inthe block to which the wings are pivoted, substantially as herein shownand described, and for the purpose of swinging the wings outward andlocking them in this position, as set forth.

3. In a boiler-hoe, the combination, with The edges of the.

the block 0 and ithe wings A, pivoted to the 7 same, of the block F androd E,:the sleeve J, and the nut K, substantially as herein shown anddescribed, and for the purpose set forth.

.4, In a boiler-hoe, the combination, with 0 the block: 0, having lugs BB, and the wings A, pivoted thereto, of the block. F, provided with endridges, G G, the rod E, and nut K, substantially as herein shown anddescribed, and for the purpose setforth. 5

5. In a bo'ilerhoe, the combination, with the block 0, having its topand bottom edges curved segmentally, of the wings A, the block I F,having its top and bottom edges curved segmentally, the rod E, and thenut K, substantially as herein shown and described, and for the purposeset forth. j v

6. In a boiler-hoe, the combination, with the block 0, having its topand bottom edges curved segmentally, of the tapering wings A, havingtheir edges curved segmentally, the block F, having its top and bottomedges curved segmentally, the rod E, and the nut K, sub stantially asherein shown and described, and for the purpose set forth. I

7. In a boiler-hoe, the combination, with the block 0, of the wings A,the block F, the rod E, the nut K, and the handle L M, sub. stantiallyas herein shown and described, and for the purpose set forth.

- JAMES lrnnscron.

Witnesses:

O. SEDGWIUK, ALFRED LURcoTT.

